Of course, anemia and pregnancy anemia can cause miscarriage, stillbirth, premature delivery, underweight and neonatal diseases, and can also induce pregnancy-induced hypertension, which seriously threatens the health of mother and baby. Therefore, iron supplementation during pregnancy is very important. Pregnant women are prone to iron deficiency anemia, which is mainly because the demand for iron in pregnant women has increased nearly four times compared with that before pregnancy. Due to the low iron content in pregnant women's diet and insufficient iron intake for a long time, the free iron and iron reserves in pregnant women are reduced. Pregnant women should have regular prenatal examinations and blood tests.